Hydrangea plant named ‘SCHROLL99-11-01’

ABSTRACT

A new and distinct cultivar of  Hydrangea  plant named ‘SCHROLL99-11-01’, characterized by its compact, upright and mounded plant habit; moderately vigorous growth habit; freely branching habit and strong stems; large mophead-type inflorescences with bi-colored sterile flowers; early and long flowering period; and strong root system.

Botanical designation: Hydrangea macrophylla.

Cultivar denomination: ‘SCHROLL99-11-01’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Hydrangea plant, botanically known as Hydrangea macrophylla and hereinafter referred to by the name ‘SCHROLL99-11-01’.

The new Hydrangea plant is a product of a planned breeding program conducted by the Inventor in Aarslev, Denmark. The objective of the breeding program was to develop new container-type Hydrangea plants with strong stems, early flowering response and attractive leaf and flower coloration.

The new Hydrangea plant originated from a cross-pollination during the spring of 2011 of a proprietary selection of Hydrangea macrophylla identified as code number 19-00, not patented, as the female, or seed, parent with a proprietary selection of Hydrangea macrophylla identified as code number 48-00, not patented, as the male, or pollen, parent. The new Hydrangea plant was discovered and selected by the Inventor in February, 2013 as a flowering plant from within the progeny of the stated cross-pollination in a controlled greenhouse environment in Aarslev, Denmark.

Asexual reproduction of the new cultivar by softwood cuttings in Aarslev, Denmark since the spring of 2013 has shown that the unique features of this new Hydrangea plant are stable and reproduced true to type in successive generations of asexual reproduction.

SUMMARY OF THE INVENTION

Plants of the new Hydrangea have not been observed under all possible combinations of environmental conditions and cultural practices. The phenotype may vary somewhat with variations in environmental conditions such as temperature and light intensity without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘SCHROLL99-11-01’. These characteristics in combination distinguish ‘SCHROLL99-11-01’ as a new and distinct Hydrangea plant:

-   -   1. Compact, upright and mounded plant habit.     -   2. Moderately vigorous growth habit.     -   3. Freely branching habit and strong stems.     -   4. Large mophead-type inflorescences with bi-colored sterile         flowers.     -   5. Early and long flowering period.     -   6. Strong root system.

Plants of the new Hydrangea differ primarily from plants of the female parent selection in the following characteristics:

-   -   1. Plants of the new Hydrangea have a stronger root system and         are easier to root than plants of the female parent selection.     -   2. Plants of the new Hydrangea are more compact and uniform than         plants of the female parent selection.     -   3. Plants of the new Hydrangea are more tolerant to full         sunlight and rain than plants of the female parent selection.

Plants of the new Hydrangea differ primarily from plants of the male parent selection in the following characteristics:

-   -   1. Plants of the new Hydrangea have a stronger root system and         are easier to root than plants of the male parent selection.     -   2. Plants of the new Hydrangea are more vigorous than plants of         the male parent selection.     -   3. Plants of the new Hydrangea flower earlier than plants of the         male parent selection.     -   4. Plants of the new Hydrangea and the male parent selection         differ in sterile flower color as plants of the male parent         selection have sterile flowers that are red in color.     -   5. Plants of the new Hydrangea are more tolerant to full         sunlight and rain than plants of the male parent selection.

Plants of the new Hydrangea can be compared to plants of Hydrangea macrophylla ‘H213901’, disclosed in U.S. Plant Pat. No. 26,221. Plants of the new Hydrangea differ primarily from plants of ‘H213901’ in the following characteristics:

-   -   1. Plants of the Hydrangea are less vigorous than plants of         ‘H213901’.     -   2. Plants of the new Hydrangea flower earlier than plants of         H213901’.     -   3. Sterile flowers of plants of the new Hydrangea are flatter         than and not as folded and curly as sterile flowers of plants of         ‘H213901’.     -   4. Plants of the new Hydrangea and ‘H213901’ differ in sterile         flower color as plants of ‘H213901’ have sterile flowers that         are dark red purple in color.

Plants of the new Hydrangea can be compared to plants of Hydrangea macrophylla ‘H213906’, disclosed in U.S. Plant Pat. No. 26,509. Plants of the new Hydrangea differ primarily from plants of ‘H213906’ in the following characteristics:

-   -   1. Plants of the Hydrangea are less vigorous than plants of         ‘H213906’.     -   2. Plants of the new Hydrangea flower later than plants of         ‘H213906’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the unique appearance of the new Hydrangea plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ from the color values cited in the detailed botanical description which accurately describe the colors of the new Hydrangea plant.

The photograph on the first sheet comprises a side perspective view of a typical flowering plant of ‘SCHROLL99-11-01’ grown in a container.

The photograph on the second sheet is a close-up view of a typical developing inflorescence of ‘SCHROLL99-11-01’ (top of sheet) and a developed inflorescence of ‘SCHROLL99-11-01’ (bottom of sheet).

DETAILED BOTANICAL DESCRIPTION

Plants used in the aforementioned photographs and in the following description were grown during the spring in 13-cm containers in a glass-covered greenhouse in Aarslev, Denmark and under cultural practices typical of commercial Hydrangea production. Plants of the new Hydrangea were pinched one time and were one year old when the photographs and description were taken. During the production of the plants, day temperatures ranged from 15° C. to 25° C., night temperatures ranged from 10° C. to 20° C. and light levels ranged from 40 to 50 klux. Plants used for the description and photographs were not treated with aluminum sulfate to “blue” the inflorescences. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2007 Edition, except where general terms of ordinary dictionary significance are used.

-   Botanical description: Hydrangea macrophylla ‘SCHROLL99-11-01’. -   Parentage:     -   -   Female, or seed, parent.—Proprietary selection of Hydrangea             macrophylla identified as code number 19-00, not patented.         -   Male, or pollen, parent.—Proprietary selection of Hydrangea             macrophylla identified as code number 48-00, not patented. -   Propagation:     -   -   Type cutting.—By softwood cuttings.         -   Time to initiate roots, summer.—About ten days at             temperatures about 18° C. to 22° C.         -   Time to initiate roots, winter.—About two weeks at             temperatures about 18° C. to 20° C.         -   Time to produce a rooted young plant, summer.—About four             weeks at temperatures about 18° C. to 20° C.         -   Time to produce a rooted young plant, winter.—About five             weeks at temperatures about 18° C. to 20° C.         -   Root description.—Strong root system; medium in thickness,             fibrous; white, close to N155D, in color.         -   Rooting habit.—Low branching; sparse. -   Plant description:     -   -   Plant and growth habit.—Perennial subshrub; compact, upright             and mounded plant habit; broadly inverted triangle; freely             branching habit with about five to six lateral branches             developing per plant; strong lateral branches; moderately             vigorous growth habit.         -   Plant height.—About 30 cm to 35 cm.         -   Plant diameter or area of spread.—About 31 cm to 40 cm.         -   Lateral branches.—Length: About 18 cm to 20 cm. Diameter:             About 1 cm. Internode length: About 2.5 cm to 4.5 cm.             Strength: Strong. Texture: Smooth, glabrous; becoming woody             with development. Color, developing: Close to 142A and 140B.             Color, developed: Close to 199B. Color, lenticels: Close to             N199B. -   Leaf description:     -   -   Arrangement.—Opposite, simple.         -   Length.—About 8.7 cm to 11.7 cm.         -   Width.—About 6.5 cm to 7.3 cm.         -   Shape.—Ovate.         -   Apex.—Acute or sub-acuminate.         -   Base.—Obtuse to rounded to slightly cordate.         -   Margin.—Serrate.         -   Texture and luster, upper surface.—Rugose, glabrous;             moderately glossy.         -   Texture and luster, lower surface.—Rough, glabrous;             prominent venation; matte.         -   Venation pattern.—Pinnate, reticulate.         -   Color.—Developing leaves, upper surface: Close to 131A and             135A. Developing leaves, lower surface: Close to 143B. Fully             expanded leaves, upper surface: Close to 131A; venation,             close to 146C. Fully expanded leaves, lower surface: Close             146C; venation, close to 146C.         -   Petioles.—Length: About 2 cm to 2.3 cm. Diameter: About 8 mm             to 9 mm. Strength: Strong. Texture, upper and lower             surfaces: Smooth, glabrous. Color, upper surface: Close to             142B, 140C and 144C. Color, lower surface: Close to 146A. -   Inflorescence & flower description:     -   -   Flower type and habit.—Showy single sterile and             inconspicuous single fertile flowers arranged on terminal             mophead-type panicles; panicles hemispherical to flattened             globular in overall shape; fertile flowers face mostly             upright and sterile flowers face upright to outwardly; early             flowering habit, plants begin flowering about eight weeks             after planting.         -   Natural flowering season.—Continuous flowering during the             summer in Northern Europe.         -   Flower longevity, fertile flowers.—Flowers last less than             one month; fertile flowers not persistent.         -   Flower longevity, sterile flowers.—Long flowering period,             flowers last about four months on the plant; sterile flowers             persistent.         -   Quantity of flowers.—Freely flowering habit with about 20             fertile flowers and about 50 to 70 sterile flowers per             panicle.         -   Fragrance.—None detected.         -   Panicle height.—About 6 cm to 8 cm.         -   Panicle diameter.—About 12 cm to 15 cm.         -   Flower diameter, fertile flowers.—About 1.2 cm.         -   Flower depth (height), fertile flowers.—About 6 mm.         -   Flower diameter, sterile flowers.—About 5 cm.         -   Flower depth (height), sterile flowers.—About 2 cm.         -   Flower shape, fertile flowers.—Deltoid.         -   Flower shape, sterile flowers.—Deltoid.         -   Flower buds, fertile flowers.—Length: About 3 mm. Diameter:             About 2 mm to 3 mm. Shape: Flattened globular. Color: Close             to 144B to 144C.         -   Flower buds, sterile flowers.—Length: About 3 mm. Diameter:             About 2 mm to 3 mm. Shape: Flattened globular. Color: Close             to 144C.         -   Petals, fertile flowers only.—Quantity and arrangement: Five             in a single whorl; valvate. Length: About 3 mm to 4 mm.             Width: About 2 mm. Shape: Deltoid. Apex: Acute. Base:             Rounded. Margin: Entire. Texture, upper surface: Smooth,             glabrous. Texture, lower surface: Rough, glabrous. Color:             When opening, upper surface: Close to 62A to 62B. When             opening, lower surface: Close to 65C; towards the margins,             close to 69B. Fully opened, upper surface: Close to 65A;             towards the margins, close to 65C to 65D; color becoming             closer to 66C and towards the margins, close to 64B to 64C             with development. Fully opened, lower surface: Close to             N66C; color becoming closer to 64C to 64D with development.         -   Sepals, fertile flowers.—Quantity and arrangement: Four in a             single whorl; imbricate. Length: About 3 mm to 4 mm. Width:             About 3 mm. Shape: Deltoid. Apex: Acute. Base: Rounded.             Margin: Entire. Texture, upper and lower surfaces: Smooth,             glabrous; velvety. Color: When opening, upper and lower             surfaces: Close to 68B and 65A; towards the margins, close             to 69B to 69C. Fully opened, upper surface: Close to 58A to             58B and 57C; towards the margins, close to 62B to 62C and             69B to 69C; color does not change with development. Fully             opened, lower surface: Close to 65B to 65C; towards the             margins, close to 69B to 69C; color becoming does not change             with development.         -   Sepals, sterile flowers.—Quantity and arrangement: Four in a             single whorl; imbricate. Length: About 1.8 cm to 2.7 cm.             Width: About 2.3 cm to 2.9 cm. Shape: Deltoid. Apex:             Subacute to rounded. Base: Rounded. Margin: Entire. Texture,             upper surface: Smooth, glabrous. Texture, lower surface:             Rugose, glabrous. Color: When opening and fully opened,             upper surface: Close to 58A to 58B and 57C; towards the             margins, close to 62B to 62C and 69B to 69C; color becoming             closer to 69A to 69B with development. When opening and             fully opened, lower surface: Close to 68B and 65A; color             becoming close to 65B to 65C and towards the margins, close             to 69B to 69C with development.         -   Pedicels, fertile flowers.—Length: About 1 mm to 2 mm.             Diameter: About 1 mm to 2 mm. Strength: Moderately strong.             Aspect: Upright to slightly slanted. Texture: Smooth,             glabrous. Color: Close to 55B.         -   Pedicels, sterile flowers.—Length: About 3 cm. Diameter:             About 4 mm. Strength: Strong. Aspect: About 30° to 40° from             vertical. Texture: Smooth, glabrous. Color: Close to 57B and             58B to 58C.         -   Reproductive organs, fertile flowers only.—Stamens: Quantity             per flower: About eight. Filament length: About 1 mm to             2 mm. Filament color: Close to 69C. Anther length: Less than             1 mm. Anther shape: Two-lobed, conical. Anther color: Close             to 155B to 155D. Pollen amount: Abundant. Pollen color:             Close to 155D. Pistils: Pistil quantity per flower: About             three. Pistil length: About 1 mm to 2 mm. Stigma shape:             Club-shaped. Stigma color: Close to 155B. Style length:             About 1.5 mm.         -   Seeds.—Quantity: Numerous. Color: Close to 200C. -   Disease & pest resistance: Plants of the new Hydrangea have been not     been observed to be resistant to pathogens and other pests common to     Hydrangea plants. -   Temperature tolerance: Plants of the new Hydrangea have been shown     to be tolerant to temperatures ranging from −5° C. to 35° C. 

It is claimed:
 1. A new and distinct Hydrangea plant named ‘SCHROLL99-11-01’ as illustrated and described. 